Get a 68/4500psi Super Lite Ninja bottle, with Ninja's famous ProV2 regulator already installed. This will save you about forty dollars, instead of buying the tank and ProV2 seperatly. The ProV2 regulator is one of, if not the best tank regulator on the market. It features the rotational aluminium bonnet, making it easy to configure your fill nipples postion. This is helpful because you can place the fill nipple in a convinent position for filling, and playing. The ProV2 is also adjustable to four different output pressures.
This bottle comes with the SHP (super high pressure) version of the regulator. Output pressure is 1,100 PSI.
This is the super light version of the Ninja Bottle. Weight is 33% less (about .75 pounds lighter).